/*
*
*
* Android "cp" replacement.
*
* The GNU/Linux "cp" uses O_LARGEFILE in its open() calls, utimes() instead
* of utime(), and getxattr()/setxattr() instead of chmod(). These are
* probably "better", but are non-portable, and not necessary for our
* purposes.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <dirent.h>
#include <fcntl.h>
#include <utime.h>
#include <limits.h>
#include <errno.h>
#include <assert.h>
#include <host/CopyFile.h>
/*#define DEBUG_MSGS*/
#ifdef DEBUG_MSGS
# define DBUG(x) printf x
#else
# define DBUG(x) ((void)0)
#endif
#define FSSEP '/' /* filename separator char */
/*
* Process the command-line file arguments.
*
* Returns 0 on success.
*/
int process(int argc, char* const argv[], unsigned int options)
{
int retVal = 0;
int i, cc;
char* stripDest = NULL;
int stripDestLen;
struct stat destStat;
bool destMustBeDir = false;
struct stat sb;
assert(argc >= 2);
/*
* Check for and trim a trailing slash on the last arg.
*
* It's useful to be able to say "cp foo bar/" when you want to copy
* a single file into a directory. If you say "cp foo bar", and "bar"
* does not exist, it will create "bar", when what you really wanted
* was for the cp command to fail with "directory does not exist".
*/
stripDestLen = strlen(argv[argc-1]);
stripDest = malloc(stripDestLen+1);
memcpy(stripDest, argv[argc-1], stripDestLen+1);
if (stripDest[stripDestLen-1] == FSSEP) {
stripDest[--stripDestLen] = '\0';
destMustBeDir = true;
}
if (argc > 2)
destMustBeDir = true;
/*
* Start with a quick check to ensure that, if we're expecting to copy
* to a directory, the target already exists and is actually a directory.
* It's okay if it's a symlink to a directory.
*
* If it turns out to be a directory, go ahead and raise the
* destMustBeDir flag so we do some path concatenation below.
*/
if (stat(stripDest, &sb) < 0) {
if (destMustBeDir) {
if (errno == ENOENT)
fprintf(stderr,
"acp: destination directory '%s' does not exist\n",
stripDest);
else
fprintf(stderr, "acp: unable to stat dest dir\n");
retVal = 1;
goto bail;
}
} else {
if (S_ISDIR(sb.st_mode)) {
DBUG(("--- dest exists and is a dir, setting flag\n"));
destMustBeDir = true;
} else if (destMustBeDir) {
fprintf(stderr,
"acp: destination '%s' is not a directory\n",
stripDest);
retVal = 1;
goto bail;
}
}
/*
* Copying files.
*
* Strip trailing slashes off. They shouldn't be there, but
* sometimes file completion will put them in for directories.
*
* The observed behavior of GNU and BSD cp is that they print warnings
* if something fails, but continue on. If any part fails, the command
* exits with an error status.
*/
for (i = 0; i < argc-1; i++) {
const char* srcName;
char* src;
char* dst;
int copyResult;
int srcLen;
/* make a copy of the source name, and strip trailing '/' */
srcLen = strlen(argv[i]);
src = malloc(srcLen+1);
memcpy(src, argv[i], srcLen+1);
if (src[srcLen-1] == FSSEP)
src[--srcLen] = '\0';
/* find just the name part */
srcName = strrchr(src, FSSEP);
if (srcName == NULL) {
srcName = src;
} else {
srcName++;
assert(*srcName != '\0');
}
if (destMustBeDir) {
/* concatenate dest dir and src name */
int srcNameLen = strlen(srcName);
dst = malloc(stripDestLen +1 + srcNameLen +1);
memcpy(dst, stripDest, stripDestLen);
dst[stripDestLen] = FSSEP;
memcpy(dst + stripDestLen+1, srcName, srcNameLen+1);
} else {
/* simple */
dst = stripDest;
}
/*
* Copy the source to the destination.
*/
copyResult = copyFile(src, dst, options);
if (copyResult != 0)
retVal = 1;
free(src);
if (dst != stripDest)
free(dst);
}
bail:
free(stripDest);
return retVal;
}
/*
* Set up the options.
*/
int main(int argc, char* const argv[])
{
bool wantUsage;
int ic, retVal;
int verboseLevel;
unsigned int options;
verboseLevel = 0;
options = 0;
wantUsage = false;
while (1) {
ic = getopt(argc, argv, "defprtuv");
if (ic < 0)
break;
switch (ic) {
case 'd':
options |= COPY_NO_DEREFERENCE;
break;
case 'e':
options |= COPY_TRY_EXE;
break;
case 'f':
options |= COPY_FORCE;
break;
case 'p':
options |= COPY_PERMISSIONS;
break;
case 't':
options |= COPY_TIMESTAMPS;
break;
case 'r':
options |= COPY_RECURSIVE;
break;
case 'u':
options |= COPY_UPDATE_ONLY;
break;
case 'v':
verboseLevel++;
break;
default:
fprintf(stderr, "Unexpected arg -%c\n", ic);
wantUsage = true;
break;
}
if (wantUsage)
break;
}
options |= verboseLevel & COPY_VERBOSE_MASK;
if (optind == argc-1) {
fprintf(stderr, "acp: missing destination file\n");
return 2;
} else if (optind+2 > argc)
wantUsage = true;
if (wantUsage) {
fprintf(stderr, "Usage: acp [OPTION]... SOURCE DEST\n");
fprintf(stderr, " or: acp [OPTION]... SOURCE... DIRECTORY\n");
fprintf(stderr, "\nOptions:\n");
fprintf(stderr, " -d never follow (dereference) symbolic links\n");
fprintf(stderr, " -e if source file doesn't exist, try adding "
"'.exe' [Win32 only]\n");
fprintf(stderr, " -f use force, removing existing file if it's "
"not writeable\n");
fprintf(stderr, " -p preserve mode, ownership\n");
fprintf(stderr, " -r recursive copy\n");
fprintf(stderr, " -t preserve timestamps\n");
fprintf(stderr, " -u update only: don't copy if dest is newer\n");
fprintf(stderr, " -v verbose output (-vv is more verbose)\n");
return 2;
}
retVal = process(argc-optind, argv+optind, options);
DBUG(("EXIT: %d\n", retVal));
return retVal;
}
